so over the course of a year or 2, my penis has only grown in length by half an inch from 3” to 3.5”. How can I tell when my penis has stopped growing and that it’s at its limit?
It's pretty much the average size for your age and trust me it still has a long time to grow. And it stand out to be 5 to 7 inches usually when erect... Anything between that is what commonly guys have. I measure 6.5 and I'm 22 years and never had a complaint from any of my gf. It's not entirely the size so relax. And let it grow. What u have is so totally normal. Just measure once it's erect.